US 7836920 B2
A bypass used for selectively dispensing fluid components includes a fluid passage with an inlet, a first outlet for fluid communication with a first collecting container, and a second outlet for fluid communication with a second collecting container. A method for dispensing fluid components using the bypass includes the steps of providing fluid components to be dispensed, with one fluid component isolated from the other fluid components, blocking the first outlet of the bypass, and dispensing the isolated fluid component through the second outlet and into the second collecting container.
1. A method for selectively dispensing fluid components employing a bypass, the bypass having a fluid passage with an inlet, a first outlet for fluid communication with a first collecting container, and a second outlet for fluid communication with a second collecting container, the method comprising the steps of:
providing the fluid components to be dispensed, wherein one of the fluid components is isolated from the other fluid components;
blocking the first outlet of the bypass; and
dispensing the isolated fluid component through the second outlet and into the second collecting container,
wherein the step of blocking the first outlet of the bypass comprises inserting a tubing line into the second outlet and past the first outlet such that the tubing line obstructs the first outlet and prevents the isolated fluid component from flowing from the inlet to the first outlet.
2. The method of
3. The method of
4. A method for selectively dispensing fluid components employing a manifold and a bypass having a fluid passage with an inlet and at least two outlets, the method comprising the steps of:
providing the fluid components to be dispensed;
blocking a first of the at least two outlets of the bypass;
connecting a second of the at least two outlets of the bypass in fluid communication with a container having a first chamber and a second chamber; and
dispensing a fluid component through the second outlet and into the first chamber of the container, independent of the manifold,
wherein the step of blocking the first outlet of the bypass comprises inserting a tubing line into the fluid passage and past the first outlet such that the tubing line obstructs the first outlet and prevents fluid from flowing from the inlet to the first outlet.
5. The method of
unblocking the first outlet of the bypass by removing the tubing line from the fluid passage;
blocking the second outlet of the bypass;
connecting the first outlet in fluid communication with the second chamber of the container via the manifold; and
dispensing the fluid component through the first outlet and into the second chamber of the container.
6. The method of
7. The method of
This is a continuation application filed in accordance with 35 U.S.C. §120 that claims priority to U.S. patent application Ser. No. 12/180,932, filed Jul. 28, 2008, which claims priority to U.S. patent application Ser. No. 11/713,267, filed Mar. 2, 2007, now U.S. Pat. No. 7,415,994, which claims priority to U.S. application Ser. No. 10/942,529, filed Sep. 16, 2004, now U.S. Pat. No. 7,204,277. The contents of all the foregoing priority U.S. Patent Applications and U.S. Patents are incorporated by reference herein in their entireties and for all purposes.
The present invention relates generally to compounder systems, and more particularly, to a compounder system having a bypass for transferring different types of solutions into separated chambers of a receiving receptacle.
Hyperalimentation therapy is the intravenous feeding of nutrients to patients. A typical solution would include a protein-carbohydrate mixture. It is used primarily to meet the patient's protein and caloric requirements that are unable to be satisfied by oral feeding. The protein may be in the form of free-amino acids or protein hydrolysate and the carbohydrate commonly is dextrose. In addition to the protein and carbohydrate, vitamins (water-soluble and fat-soluble) and electrolytes also can be supplied in this therapy.
Each of these parenteral ingredients and the combination thereof are particularly susceptible to the growth of deleterious organisms and it is desirable that they be administered to the patient in a sterile condition. In addition, the solutions are tailor made to specific patient requirements under the direction of a physician. Thus, because these protein and carbohydrate solutions must be combined close, but prior, to their time of use, their compounding must be performed under sterile conditions to avoid organism growth.
As a part of this compounding, the solutions that are to be administered intravenously are transferred into a total parental nutrition bag (commonly referred to as a TPN bag). Such bags are designed for home use or use in a hospital or care facility. Once filled they can be stored for a limited period of time in a standard refrigerator. The bags are filled with the solutions by a pharmacist either by gravity or by a device known as a high speed bulk compounder. Such compounders typically are capable of supplying solutions from up to nine different source bags (and possibly more) or containers to a receiving product bag at relatively high flow rates.
The source containers may be hung from a framework of the compounder while the receiving bag is hung from a load cell that measures the weight of the receiving bag. A pump set consisting of a number of pump legs (for example, nine or more such legs) or flow paths is designed to be used with the compounder. Each of the pump legs includes flexible tubing and terminates on one end with a piercing administration spike or similar connector that is used to connect the leg of the pump set to one of the source containers. The other end of each leg is coupled to one of the inlet ports of a common manifold equipped with an exit port that is adapted to be coupled to a fill tubing connected to the receiving TPN product bag.
In those instances where a high-speed compounder is used, each leg of the pump set is associated with a different peristaltic pump or pump station of the compounder. A microprocessor in the compounder controls each of the peristaltic pumps or pump stations to thereby control the amount of solution being supplied from each source container through the particular pump leg and the manifold to the receiving product bag. The amount of solution being supplied from each source container is in part determined by information being supplied to the microprocessor of the weight being measured at selected times by the load cell from which the receiving bag is suspended. The peristaltic pumps draw solutions from each of the source containers sequentially under the control of the microprocessor and the solutions flow through the common manifold and the fill tubing into the receiving product bag.
A problem arises when one of the fluids to be introduced into the product bag is a lipid solution. Lipid solutions are essentially fat emulsions and typically are placed into a separate compartment within the product bag which is isolated from the remaining mixture until immediately before (or very soon before) the solution is administered to a patient. This isolation is necessary because the lipid solution, if mixed with the other ingredients ahead of time, clouds the overall solution mixture and renders it unusable. This phenomena is known in the art as “hazing.” Because of the undesirability of mixing lipids with the other solutions prior to the time of administration, a problem has existed in the prior art where a residual amount of the lipid solution is allowed to remain in a common volume of the manifold after a lipid solution is pumped through but before the next non-lipid solution is pumped through. When the subsequent solution is pumped through, the residual lipid solution is carried into the product bag and hazing results.
One solution has involved the use of a chambered product bag. By pumping the lipids into a separate chamber of the product bag, the lipids will not mix and “haze” the solution. Immediately before the solution is used, the separated chamber with the lipids is allowed to mix with the remaining solution to form the product solution. To fill the chambered bag using conventional compounders, one line of the compounder must be devoted specifically for lipids and be attached directly to the separated chamber of the product bag. By using the compounder in this manner, however, one line is not used if the overall solution does not require a lipid component.
The present invention is directed to a tube set for dispensing components into a product bag. The tube set comprises a plurality of tubing lines, a manifold, and a bypass. The manifold has a plurality of inlets, each inlet adapted for connection to a respective tubing line. The manifold also has an outlet connectable to a first feed tube of a product bag. The bypass is associated with at least one of the plurality of tubing lines. The bypass has a bypass inlet connectable to the tubing line associated with the bypass. The bypass also has at least two outlets. A first outlet is connected to a tube line in fluid communication with an inlet of the manifold and a second outlet is removably connectable to a second feed line in fluid communication with the product bag.
According to another embodiment, the present invention is directed to a bypass for a tube set. The tube set includes a manifold and a plurality of tubing lines for dispensing fluid components into a product bag. The bypass comprises an inlet fluid passage adapted for connection to a tubing line of the tube set, an outlet adapted to receive a tubing line in fluid communication with the product bag, and a bypass fluid passage adapted for connection to a tubing line in fluid communication with the manifold. The bypass is configured such that fluid enters the bypass inlet fluid passage and exits through the outlet only when the outlet is connected to a tubing line in direct fluid communication with the product bag.
An exemplary method of the present invention is a method for selectively dispensing fluid components into a product bag attached to a tube set of a bulk compounder. The bulk compounder includes a product bag attached to a tube set having a plurality of tube lines, a manifold, and a bypass having a fluid passage with an inlet and at least two outlets. The method includes providing liquid components to be dispensed into the product bag with one of the liquid components to be maintained separately from the other liquid components, inserting a tube line in fluid communication with the product bag into the bypass first outlet, blocking the bypass second outlet in fluid communication to the manifold, and dispensing the fluid component to be maintained separate from the other liquid components through the bypass and into the product bag, independent of the manifold.
Although the invention is illustrated and described herein with reference to specific embodiments, the invention is not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope and range of equivalents of the claims and without departing from the invention.
Referring to the Figures where like numerals represent like features,
As one example, due to injury, disease, or trauma, a patient may need to receive all or some of his or her nutritional requirements intravenously. In this situation, the patient will typically receive a basic solution containing a mixture of amino acids, dextrose, and fat emulsions, which provide a major portion of the patient's nutritional needs, which is called total parenteral nutrition, or, in shorthand, TPN. In this arrangement, a physician will prescribe a mixture of amino acids, dextrose, and fat emulsions to be administered, as well as the frequency of administration. To maintain a patient for an extended period of time on TPN, smaller volumes of additional additives, such as vitamins, minerals, electrolytes, etc., are also prescribed for inclusion in the mix. Using system 10, under the supervision of a pharmacist, the prescription order is entered and individual doses of the prescribed liquids, drugs, and/or additives are accordingly transferred from separate individual source containers for mixing in a single container for administration to the individual.
There are other environments where system 10 is well suited for use. For example, in the medical field, system 10 can be used to compound liquids and/or drugs in support of chemotherapy, cardioplegia, therapies involving the administration of antibiotics and/or blood products therapies, and in biotechnology processing, including diagnostic solution preparation and solution preparation for cellular and molecular process development. Furthermore, system 10 can be used to compound liquids outside the medical field.
Tube set 15 is a part of system 10. Tube set 15 includes lengths of transfer tubing line 20, which are joined at one end to a common manifold 45. At the opposite ends of the transfer tubing 15 are spikes or releasable couplings 100. Couplings 100 can be inserted in conventional fashion through a diaphragm carried by the associated source solution container (not shown), which allows flow communication between the source solution container and the respective transfer tubing line 20. From manifold 45, a first feed line 50 is coupled to a product bag 80. As shown in the embodiment of
Also shown in
As shown in the embodiment of
Referring again to
When a lipid solution is not used in the formulation, i.e., when components of the liquid need not remain separate from the other components, second feed line 60 may be removed from bypass 23. Thus, the liquid in the tube line connected to bypass inlet 25 will flow to bypass 23 and will exit via bypass fluid passage 200, which is connected via tubing 40 to manifold 45. The fluid flow direction is shown by line B in
According to an embodiment of the present invention, tube set 15 connected to manifold 45 and bypass 23 can be fabricated independently and joined together to form a single device made up of these individual components. Preferably, these components can be ultrasonically welded to their respective mate. The means of joining the components are discussed in detail below. The primary advantage to such a construction is ease of manufacture.
Bypass 23 could be made from any of a number of suitable materials, including plastics, such as polycarbonates, that are suitable to handle the pharmaceutical and food preparations that will be passing therethrough. The suitable materials should also preferably be such that they can be injection molded to form the parts of the device, or the whole device, and one skilled in the art would know such materials.
While preferred embodiments of the invention have been shown and described herein, it will be understood that such embodiments are provided by way of example only. Numerous variations, changes and substitutions will occur to those skilled in the art without departing from the spirit of the invention. Accordingly, it is intended that the appended claims cover all such variations as fall within the spirit and scope of the invention.